package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> dishVOS =dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(dishVOS.getTotal(),dishVOS.getResult());
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本信息
        dishMapper.update(dish);

        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        List<DishFlavor> flavors=dishDTO.getFlavors();
        if (flavors != null&&flavors.size()>0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));;
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {

        Dish dish=dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        //将查询数据封装到VO
        DishVO dishVO= new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能删除 是否存在起售中的商品
        for (Long id:ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //是否被套餐关联
        List<Long> setmealIdByDishIds = setmealMapper.getSetmealIdByDishIds(ids);
        if (setmealIdByDishIds != null&&setmealIdByDishIds.size()>0) {
            //当前菜品被套餐关联了，不能删
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
//        for (Long id:ids) {
//            dishMapper.deleteById(id);
//            dishFlavorMapper.deleteByDishId(id);
//        }
        dishMapper.deleteBatch(ids);
        dishFlavorMapper.deleteBatch(ids);
    }

    //新增菜品和对应口味
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors.size()>0 && flavors!=null) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            dishFlavorMapper.insertBatch(flavors);
        }



    }
}
